The effect of 3-h and 6-h sleep deprivation on sleep and EEG spectra of the rat.
Vigilance states and EEG power density of the rat were determined after a 3- or 6-h sleep deprivation (SD) in the beginning of the 12-h light period. In comparison to baseline, non-rapid eye movement (REM) sleep showed a delayed and transitory increase after 3 h SD, and an immediate and persistent increase after 6 h SD. REM sleep was not affected. In non-REM sleep, EEG power density in the low-frequency range (0.75-6.0 Hz) was markedly enhanced after 6 h SD, but not significantly increased after 3 h SD. In REM sleep EEG activity in the 5-6 Hz band was increased after 6 h SD. We conclude that in the early part of the light period, 3 h waking prolongs non-REM sleep, whereas 6 h waking also enhances non-REM sleep intensity.
Tobler
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Institute of Pharmacology, University of Zürich, Switzerland.
Borbély
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AA
D000818:Animals; D001143:Arousal / Q000502:physiology; D002540:Cerebral Cortex / Q000502:physiology; D002940:Circadian Rhythm / Q000502:physiology; D004569:Electroencephalography; D005071:Evoked Potentials; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains; D012815:Signal Processing, Computer-Assisted; D012892:Sleep Deprivation / Q000502:physiology*; D012894:Sleep Stages / Q000502:physiology*; D012895:Sleep, REM / Q000502:physiology; D014851:Wakefulness / Q000502:physiology